{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x32c047b230ad6ca41dc6d23daaa887504c0ac8db20c05ee6317fc1cdc4065f94",
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    "signer": "0x4af4E9B1aFBc8e3a6f2fAB9EC006D58066ca6fD6",
    "userId": "473569856"
  }
}